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7.10.3EMIFAElectricalData/Timing
AECLKIN
2
3
4
4
5
1
SM320C6455-EP
FIXED-POINTDIGITALSIGNALPROCESSOR
SPRS462B–SEPTEMBER2007–REVISEDJANUARY2008
Table7-42.TimingRequirementsforAECLKINforEMIFA
(1)(2)
(seeFigure7-31)
-720
-850
A-1000/-1000
NO.UNIT
-1200
MINMAX
1t
c(EKI)
Cycletime,AECLKIN6
(3)
40ns
2t
w(EKIH)
Pulseduration,AECLKINhigh2.7ns
3t
w(EKIL)
Pulseduration,AECLKINlow2.7ns
4t
t(EKI)
Transitiontime,AECLKIN2ns
5t
J(EKI)
PeriodJitter,AECLKIN0.02E
(4)
ns
(1)ThereferencepointsfortheriseandfalltransitionsaremeasuredatV
IL
MAXandV
IH
MIN.
(2)E=theEMIFinputclock(AECLKINorSYSCLK4)periodinnsforEMIFA.
(3)MinimumAECLKINcycletimesmustbemet,evenwhenAECLKINisgeneratedbyaninternalclocksource.MinimumAECLKINtimes
arebasedoninternallogicspeed;themaximumuseablespeedoftheEMIFmaybelowerduetoACtimingrequirements.
(4)ThistimingonlyapplieswhenAECLKINisusedforEMIFA.
Figure7-31.AECLKINTimingforEMIFA
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